DualHead configuration

I'm using one geforce 7600 gs video card and two BenQ G2220HD displays. Here is my xorg.conf.

# Xorg configuration created by system-config-display

Section "ServerLayout"
        Identifier     "Multihead layout"
        Screen      0  "Screen0" 0 0
        Screen      1  "Screen1" rightOf "Screen0"
        InputDevice    "Keyboard0" "CoreKeyboard"
        InputDevice    "Mouse0" "CorePointer"
        Option      "Xinerama" "on"
        Option      "Clone" "off"
EndSection

Section "Files"
        FontPath     "unix/:7100"
EndSection

Section "Module"
        Load  "dbe"
        Load  "extmod"
        Load  "type1"
        Load  "freetype"
        Load  "glx"
EndSection

Section "InputDevice"

    # generated from default
        Identifier  "Mouse0"
        Driver      "mouse"
        Option      "Protocol" "auto"
        Option      "Device" "/dev/psaux"
        Option      "Emulate3Buttons" "no"
        Option      "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"

    # generated from data in "/etc/sysconfig/keyboard"
        Identifier  "Keyboard0"
        Driver      "kbd"
        Option      "XkbLayout" "us"
        Option      "XkbModel" "pc105"
EndSection

Section "Monitor"

 ### Comment all HorizSync and VertSync values to use DDC:
 ### Comment all HorizSync and VertSync values to use DDC:
        Identifier   "Monitor0"
        VendorName   "BenQ"
        ModelName    "LCD Panel 1920x1080"
 ### Comment all HorizSync and VertSync values to use DDC:
        HorizSync    31.5 - 67.0
        VertRefresh  56.0 - 65.0
        Option      "DPMS"
EndSection
Section "Monitor"

 ### Comment all HorizSync and VertSync values to use DDC:
 ### Comment all HorizSync and VertSync values to use DDC:
        Identifier   "Monitor1"
        VendorName   "Monitor Vendor"
        ModelName    "LCD Panel 1920x1080"
 ### Comment all HorizSync and VertSync values to use DDC:
        HorizSync    31.5 - 67.0
        VertRefresh  56.0 - 65.0
        Option      "dpms"
EndSection

Section "Device"
        Identifier  "geforce7600gs0"
        Driver      "nvidia"
        VendorName  "NVIDIA Corporation"
        BoardName   "nVidia Corporation G70 [GeForce 7600 GS]"
        BusID       "PCI:1:0:0"
        Screen      0
EndSection

Section "Device"
        Identifier  "geforce7600gs1"
        Driver      "nvidia"
        VendorName  "Videocard Vendor"
        BoardName   "nVidia Corporation G70 [GeForce 7600 GS]"
        BusID       "PCI:1:0:0"
        Screen      1
EndSection

Section "Screen"
        Identifier "Screen0"
        Device     "geforce7600gs0"
        Monitor    "Monitor0"
        DefaultDepth     16
        SubSection "Display"
                Viewport   0 0
                Depth     16
                Modes    "1680x1080"
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     16
        EndSubSection
EndSection

Section "Screen"
        Identifier "Screen1"
        Device     "geforce7600gs1"
        Monitor    "Monitor1"
        DefaultDepth     16
        SubSection "Display"
                Viewport   0 0
                Depth     16
                Modes    "1680x1080"
        EndSubSection
EndSection